Roads could become slick during times of sub-freezing temps or if snow rates are heavy enough to overcome the warmer concrete temperatures.
Another item to note is that it is possible that you could be driving in an area with no snow and good visibility, but then be impacted by a moderate snow shower that abruptly drops visibility. Be careful out there!
Another item to note is that it is possible that you could be driving in an area with no snow and good visibility, but then be impacted by a moderate snow shower that abruptly drops visibility. Be careful out there!